#5973CA
Closest named color: Windows Blue (#3778BF). oklch(57.7% 0.137 269.2), rgb(89, 115, 202).
Aa
Black text reads best on this color (4.72:1).
About this color
#5973CA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.137 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.041 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.72:1 |
| White text | 4.43:1 |
Values
| HEX | #5973CA |
| RGB | rgb(89, 115, 202) |
| HSL | hsl(226, 52%, 57%) |
| OKLCH | oklch(57.7% 0.137 269.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #5973CA | 4.43:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5973CA | 4.72:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #5973CA text on white | 4.43:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #5973CA text on black | 4.72:1 | AA | Lc -31.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0C0E9
oklch(80.9% 0.061 268.3)
-
Step 400
400
#889EDF
oklch(70.8% 0.099 269.4)
-
Step 500
500
#6B84D6
oklch(63% 0.127 269.7)
-
Step 600
600 (this color)
#5973CA
oklch(57.7% 0.137 269.2)
-
Step 700
700
#445AA8
oklch(49% 0.127 269.4)
-
Step 800
800
#384A88
oklch(42.7% 0.105 269.4)
-
Step 900
900
#303E6D
oklch(37.6% 0.083 269.6)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#5973CA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4D7DCD | 0.027 |
| Deuteranopia (no green cones) | #3F73C8 | 0.028 |
| Tritanopia (no blue cones) | #138695 | 0.122 |
| Achromatopsia (no color) | #787878 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5973CA
#5973CA
oklch(57.7% 0.137 269.2)
- #957500
#957500
oklch(57.7% 0.118 89.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #5973CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.054
- Royal Blue #4169E1 ΔE 0.055
- French Blue #436BAD ΔE 0.056
- Cool Blue #4984B8 ΔE 0.061
- Steel Blue #4682B4 ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.064
- Slate Blue #6A5ACD ΔE 0.065
Use #5973CA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.